How do I make a UDP server constantly receive datagrams in Python

Question

I am creating a server and client socket in Python. I have managed to send datagrams between them but I need to set the server to constantly listen for UDP messages but I can't work out how. I have seen the serve_forever() function but when I enter it, it tells me that 'NameError: name 'serve_forever' is not defined. Do I need to import something or have I missed something completely. I am quite new to this so wasn't sure if I needed to add anything else in. Here is the beginning of the code:

     import socket

     serverSocket = socket.socket(socket.AF_INET , socket.SOCK_DGRAM)

     UDP_IP = "localhost"
     UDP_PORT = 6842
     address = ("localhost" , 6842)

     serverSocket.bind(address)
     serve_forever()
     print ("Waiting for client...")

Answer 1

I suspect you can replace serve_forever() with something this:

while True:
   data = serverSocket.recv(65535)
   print("Received a UDP packet containing %i bytes of data" % len(data))